I recommend beginning the trip on the south coast, there are so many amazing places there to explore.
There are many beautiful places to see on the Snæfellsnes Peninsula. It is fairly close to Reykjavík but not as many tourists go there (compared to the south coast).
A big part of exploring the Westfjords is just driving and enjoying att the fjords and mountains. It is recommended to have a good car, preferable a 4x4 jeep.
These are day trips you can do while staying in Reykjavík
The Icelandic lopapeysa (knitted wool sweater) is so warm and comfortable in the Icelandic unpredictable weather.
Local beers, fancy cocktails or clubs
Did you know that Keflavik International Airport is a 45 minute drive from Reykjavik? Here's everything you need to make this easy and seamless!